Can I replace the glass (only) in my passenger side mirror? on 2001 Honda Accord

Someone recently stole the entire piece of mirror glass out of the housing, leaving the adjusters intact, and an empty socket where (I presume) the fixed pivot ball on the back of a new one would fit. So it looks like it is more or less a pop-in replacement. But all I find are instructions for gluing a new piece over the remnants of the old one (there are no remnants) or the backing plate (it is gone also). But the housing and the power adjuster all work fine. Anyone know where or how I can get a replacement, with, if necessary, the backing plate?